classCanvas{ _initEvents() {// 首先肯定要添加事件监听啦Util.addListener(this.upperCanvasEl,'mousemove',this._onMouseMove.bind(this)); } _onMouseMove(e: MouseEvent) {// 如果是 hover 事件,我们只需要改变鼠标样式,并不会重新渲染conststyle =this.upperCanvasEl.style;// findTarget 的过程就是看...
<body><canvasid="canvas"width="100"height="100"></canvas><script>letcanvas=document.getElementById('canvas')canvas.width=document.documentElement.clientWidthcanvas.height=document.documentElement.clientHeight// 画线letctx=canvas.getContext('2d')ctx.fillStyle='rgb(200,0,0)'canvas.onclick=(e)=>{...
//html2canvas.hertzen.com/build/html2canvas.js"></script> <script type="text/javascript"> $(document).ready(function() { $(".example1").on("click", function(event) { event.preventDefault(); html2canvas($(".aa"), { // height: $(".aa").outerHeight() + 20, allowTaint: true,...
How to stopPropagation when click data point? Started by: intijk in: Chart Support 2 6 6 years, 1 month ago Vishwas R Button to zoom Started by: Emeric in: Chart Support 3 9 7 years, 5 months ago Emeric click feature is annoying when using together with zoom Started by: ...
<el-button @click="handleClear">重置</el-button> </div> </template> </el-dialog> <script setup>const visible= ref(false) const isDown= ref(false)//是否可以绘制const canvas = ref(null)//canvas 元素const ctx = ref(null)//ctx承接上下文//鼠标按下functionmousedown (e) { ...
css('width', canvasWidth + 'px') drawGrid() $("#clear_btn").click( function(e) { context.clearRect(0, 0, canvasWidth, canvasHeight) drawGrid() } ) $(".color_btn").click( function(e){ $('.color_btn').removeClass('color_btn_selected') $(this).addClass('color_btn_selected'...
margin: 100px; }</style><body><divstyle="margin-bottom: 10px">上传图片:<inputtype="file"onchange="onChange(this.files[0])"></div><canvasid="cvs"></canvas><canvasid="clipCvs"></canvas><buttonid="download">下载图片</button><script>const cvs = document.getElementById('cvs'); ...
canvas元素的omclick等事件就可以啊，我不清楚如何获得canvas的坐标，因为我要区分单击的是哪个位置 ...
Canvas不仅可以用于静态绘图,还可以用于创建交互式图形。你可以通过添加事件监听器来实现交互性。 1、鼠标交互 以下是一个简单的示例,通过鼠标点击在Canvas上绘制一个圆形: canvas.addEventListener('click', (event) => { const rect = canvas.getBoundingClientRect(); ...
Konva.js是一个强大的HTML5 Canvas库,用于创建交互式的图形和动画。它提供了一个简单易用的API,可以用于绘制图形、处理用户交互、添加动画效果等。 一、Canvas的DOM 你可以将Konva.js看作是操作Canvas的DOM。 Konva.js提供了一个类似于DOM操作的API,使你可以创建、添加、删除和修改Canvas上的图形元素,就像操作HTML...